Shears.



C. F. ZIMMERMAN.

SHEARS.

APPLICATION FILED APR.23. ma.

1 214,635. Patented Feb. 6,1917.

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CHARLES F. ZIMMERMAN, OF JERSEY CITY, NEVI JERSEY.

SHEARS.

Specification of Letters Patent.

Patented. Feb. 6, 1917.

Original application filed January 25, 1912, Serial No. 673,289. Dividedand this application filed April 23, 1913. Serial No. 762,990.

To all whom it may concern:

Be it known that I, GI-IARLns F. ZIMMER- MAN, a citizen of the UnitedStates, and resident of Jersey City, county of Hudson, State of NewJersey, have invented a new and useful Improvement in Shears, of whichthe following is a specification.

My invention relates to shears for cutting sheet metal or the like andhas for its object to n-ovide a simple and el'licient shears which can.be easily manipulated and by means of which a powerful leverage can beapplied to the blades or jaws to effect the cutting action.

A further object of my improvement is to provide a shears in which theblades have a relative sliding movement to effect a true shearing out,which shears comprise comparatively few parts, light in weight, andcompact in form and in which one of the blades is removable andreplaceable when necessary or desirable.

My invention will be fully described hereinafter and the features ofnovelty will be pointed out in the appended claim.

The present application is a division of one filed by me in the UnitedStates Patent Oflice on or about January 25, 1912, Serial Number673,289.

Reference is to be had to the accompanying drawings in which- Figure 1is an elevation of my improved shears in its closed position and Fig. 2is a similar View showing the shears in open position.

Referring to the drawings, the shears comprise a main handle consistingof a member A, constructed of steel or any other suitable material andterminating at one end in a finger loop 13 and at its other end in ablade C. A second converse blade D is provided with a slot E and ispivotally and slidably secured to the member A by means of a screw orsimilar element F which passes through the slot E and screws into themember A. An auxiliary handle comprising a member G terminating at oneend in a finger loop H is pivotally connected at I with the member A andhas a portion extending beyond the pivot I and beyond the blade G andforming an angularly disposed projection the free end of which ispivotally connected at U with the blade D.

When the finger loops B and H are moved toward and away from each other,the members A and G will be rocked on the pivot I and will cause theblades C and D to similarly move toward and away from each other, theblade D .at the same time being given a sliding movement relatively tothe blade G, the extent of said sliding movement being determined by thelength of the slot E. In this manner the blade D is not only given arocking movement relatively to the blade C, but is also moved lengthwiserelatively thereto so that a true shearing action of the blades iseHected in a manner which will. be readily understood and which augmentsthe efliciency of the cutting blades. In other words an initial movementof the handle H will move the blade I) toward the front end of theshears and will bring the cutting edges of the two blades C and D intosubstantial parallelism. A continued movement of the handle H will causethe blade D to move toward the blade 0, both cutting edges remainingsubstantially parallel during this latter movement and beingconsequently effective throughout their entire length during the entireactual cutting operation. With this construction a very powerfulleverage is obtained, which permits of the cutting of tough andresistant materials and at the same time an extremely clean cut itsecured, regardless of the material being operated upon, which materialis firmly gripped by the blades at the commencement of the actualcutting operation against any wedging forward as the blades cometogether.

Various modifications may be made within the scope of the claim withoutdeparting from the spirit of my invention.

Special features of my shears will be found in the interchangeability ofthe cutting blades so that the shears, as such, need not be idle duringthe time that one of the dull blades is being resharpened and the factthat the work is gripped at once as soon as the shear blades touch it atopposite sides,

thereby preventing any sliding of the work along the edges of theblades. Either the slot E or the shoulder K, or the shoulder L,indicated in the dotted lines, or any two or all three together, or someadditional means may be employed to limit the position of the blades inthe closed condition.

I claim:

A shears comprising a main handle, a

blade formed integrally therewith and having a straight cutting edge, anauxiliary handle, a pivot located in close proximity to the inner end ofthe cutting edge of said integral blade and pivotally connecting saidauxiliary handle to said main handle, a sec ond blade having a straightcutting edge, an integral member extending rearwardly from said secondblade and provided with a slot, a second pivot extending through saidslot whereby said second blade is pivotally and slidably connected withsaid main handle, said second pivot being located entirely below animaginary line forming a continuation of the cutting edge of saidintegral blade, a projection on said auxiliary handle extending beyondthe first and second pivots and a pivot located below said second pivotin all positions of the shears whereby said projection is pivotallyconnected to said sec ond blade and moves the latter from an openposition, first forwardly relatively to said integral blade to bring thecutting edges of said blades into a parallel position without exertingany appreciable cutting action and then to ard said integral blade toeffect a chopping cut.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

HARLES F. ZIMMERMAN.

Witnesses R. Annn rr, Flinn A. KLEIN.

Gcpies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. C. r

